Nicholson Water & Sewer Association Inc. — NPDES permit MS0033871: limits, due date and EPA's record

Sewage treatment plant, Nicholson, Mississippi. NPDES permit MS0033871, in force until Nov 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (25)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	minimum	≥ 6 mg/L	all year
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 24 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 36 mg/L	all year
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 36 lb/d	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 54 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	maximum monthly average	≤ 60 mg/L	all year
Solids, total suspended	daily maximum	≤ 60 mg/L	all year
Solids, total suspended	maximum monthly average	≤ 90 lb/d	all year
Solids, total suspended	daily maximum	≤ 90 lb/d	all year
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 2 mg/L	all year
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 1.37 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 3 mg/L	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 2.06 mg/L	all year
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 3 lb/d	all year
Nitrogen, ammonia total [as N]	maximum monthly average	≤ 2.1 lb/d	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 5 lb/d	all year
Nitrogen, ammonia total [as N]	daily maximum	≤ 3.1 lb/d	all year
Flow, in conduit or thru treatment plant	maximum monthly average	≤ .18 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	maximum monthly average	≤ .011 mg/L	all year
Chlorine, total residual	daily maximum	≤ .019 mg/L	all year
E. coli	maximum monthly average	≤ 126 #/100mL	all year
E. coli	daily maximum	≤ 410 #/100mL	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MS0033871 · MCP: https://passage-data.com/mcp